package com.sky.interceptor;

import com.sky.constant.JwtClaimsConstant;
import com.sky.context.BaseContext;
import com.sky.properties.JwtProperties;
import com.sky.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Slf4j
@Component
public class JwtTokenUserInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;

    /**
     * 校验用户Jwt
     * @param request
     * @param response
     * @param chain
     * @return
     */
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object chain) throws Exception
    {
        //如果不是动态方法接口直接放行
        if(!(chain instanceof HandlerMethod))
        {
            return true;
        }

        String token = request.getHeader(jwtProperties.getUserTokenName());

        try {
            Claims claims = JwtUtil.parseJWT(jwtProperties.getUserSecretKey(), token);
            Long userId = Long.valueOf(claims.get(JwtClaimsConstant.USER_ID).toString());
            log.info("当前用户id：", userId);
            //3、通过，放行
            BaseContext.setCurrentId(userId);
            return true;
        } catch (NumberFormatException e) {
            //4、不通过，响应401状态码
            response.setStatus(401);
            return false;
        }
    }

}
